Boiler scrapper and cleaner.



No. 745,642. PATBNTEDDEG. 1, 1903.

H. G. MILLER.

BOILBR SGRAPBR AND CLEANER.

y APPLIGATION FILED DEG. 4, 1902.

N0 MODEL.

witwassen r UNITED STATES Patented ecember 1, 1903.

PATENT OFFICE.

BOlLER SCRAPER vAND CLEANER.

SPECIFICATION forming part of Letters Patent No. 745,642, dated December-1, 1903.

Application tiled December 4, 1902. Serial No. 133,932. (No model.)

To all whom it may concern.: A

Be it known that l, HUGH C. MILLER, 'a citizen of the United States,residing at Brenham, in the county of vWashington and State of Texas,have invented a new and usefulr vided to permit the rapid discharge ofthe refuse-laden water.

The construction which at present is considered preferable and hasproven entirely satisfactory is shown inthe accompanying drawings and isdescribed in the following speeicaticn.V VThe right is reserved,however, to make changes and modifications from the embodiment setforth.

In the drawings, Figure 1 is a perspective view of a boiler, a portionof the shell thereof being broken away to more clearly show thearrangement of the improved cleaning means. Fig. 2 is a sectional view,on an enlarged scale, through* the lower portion of the boiler and thecleaning means. Fig. 3 is a detail perspective view, on an enlargedscale, of said means. Fig. 4 is a verticalcross-sectional view throughthe same.

Similar numerals. of reference designat corresponding parts in all thefigures of the drawings.

In the present embodiment the boiler-shell is designated as a whole bythe referencenumeral 10 and may be of any form desired or well known tothe art, in itself forming no part of the present invention, the tubesnot being shown in the lower portion of said boiler in order that theinvention maybe fully illustrated. Arranged longitudinally within thelower portion of the shell, and spaced a slight distance above thebottom thereof, is an outlet conduit or pipe 11, that extends throughthe end wall to any distance desired and has a T-coupling 12 at itsouter end, to one nipple of which is attached a valved outlet 13, theother being connected to a head 14, which is in the form of astuifing-box. The pipe or conduit 1l hasits inner end open andterminating short of the adja cent; end of the boiler, being,furthermore, provided in 'its under wall with a longitudinally-disposedslot 15.

Arranged within the boiler-shell, and conforming to the shape thereof,is a plurality of cleaning devices, which may be of any wellknown form,but preferably consist of steel or metallic scraper-blades 16, that restagainst the inner face of the boiler-shell. Located longitudinallywithin the pipe 11 is an actuatingstem 17, that extends through the stud- `ing-box 14 and has an exteriorly-arranged handle 18. This stem, asshown in Figs. 3 and 4, is preferably tubular in form, being providedwith transversely-disposed openings v19. The scraper-blades lareconnected with the stem by means of Shanks 20, riveted or otherwisesecured to said blades and passing through the slot 15 ofthe pipe, theupper ends of the shanks also passing through the openings 19 of thestem and being secured therein by rivets or bolts 21. It will be evidentthat when the stem is reciprocated the scraperblades will be moved backand forth over the interior face of the boiler-shell, thereby dislodgingany accumulation thereon. At the same time the water will be thoroughlyagitated toprevent the sediment again settling. Upon opening the valve13 the pressure within the boiler will canse the refusedaden water topass through the slot 15 in the pipe, so that it will rapidly discharge.At the same time the Shanks 20, moving longitudinally in said slot, willprevent the same being clogged and will also assistin keeping theoutlet-pipe clear. Thus a simple and effective cleaning device isprovided, which will not only scrape loose any sediment, but willthoroughly remove the same from the boiler. The cleaning operation canfurthermore, be easily eected without materially interfering with theuse of the boiler for its usual purposes. Y

From the foregoing it is Vthought that the construction, operation, andmany advantages of the herein-described invention will be apparent tothose skilled in the art without further description, and it will beunder- IOC stood that various changes in the size, shape, proportion,and minor details of construction may be resorted to without departingfrom the spirit or sacrificing any of the advantages of the inventionforinstance, the invention can be and is intended to be operated fromeither end of the boiler, and in high-pressure boilers the piston orstem can be extended and actuating means arranged Within the pipe andconnected with the scraper for moving the same between the pipe andshell.

3. In a boiler, the combination with the boiler-shell, of a blow-offpipe arranged inside the shell and having an opening in its wall, acleaning device arranged Within the boiler exteriorly of the pipe,actuating means movably mounted within the pipe, and a connectionbetween the cleaning device and the actuating means, said connectionpassing through the opening.

4. In a boiler, the combination with the boiler, of a blow-off pipelocated within the boiler and having a longitudinal slot in its wall, acleaning device arranged Within the Y boiler exteriorly of the pipe andcoacting with the boiler-wall,actuating means movably mounted within thepipe, and a connection between the cleaning device and the actuatingmeans, said connection passing through and being longitudinally movablein t-he slot.

5. In a boiler, the combination with the boiler, of a blow-off pipearranged longitudinally within the boiler, a plurality of spacedcleaning devices located in the boiler exteriorly of the pipe, anactuating-stem located and longitudinally movable Withinl the pipe, andmeans connecting the stem and the cleaning devices. Y

6. 'In a boiler, the combination with an outlet-pipe having alongitudinal slot, of a plurality of cleaning devices arrangedtransversely and exteriorly of the pipe, an actuating-stem arrangedlongitudinally Within the pipe, and connections between the stem andcleaning devices.

7. In a boiler, the combination with an outlet-pipe having alongitudinal slotin its under wall, of a plurality of curvedcleaningblades arranged transversely and eXteriorly of the pipe, anactuating-stem arranged longitudinally within the pipe, and a pluralityof shanks connecting the stem and blades and passing through the slot inthe pipe.

8. In a boiler, the combination with a hollow actuating-stem havingalined openings in its opposite Walls, of a cleaning device having ashank that passes through and snugly fits in the openings, being heldthereby against movement with respect to the stem, and means forsecuring the shank to the stem.

In testimony that I claim the foregoing as my own I have hereto aftixedmy signature in the presence of two witnesses.

y HUGH C. MILLER.

Witnesses:

J. D. CAMPBELL, I. D. AFFLECK.

